---
features:
  - |
    The ``os_neutron`` role will now default to the OVS firewall driver when
    ``neutron_plugin_type`` is ``ml2.ovs`` and the host is running Ubuntu
    16.04 on PowerVM. To override this default behavior, deployers should
    define ``neutron_ml2_conf_ini_overrides`` and
    'neutron_openvswitch_agent_ini_overrides' in 'user_variables.yml'. Example
    below

    ::

      neutron_ml2_conf_ini_overrides:
        securitygroup:
          firewall_driver: neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver
      neutron_openvswitch_agent_ini_overrides:
        securitygroup:
          firewall_driver: iptables_hybrid
